Just wondering if anyone knows why some older Tokai's have the model number stamped on the bottom of the FB, and others don't? I have two 1980's, (LS-50, LS-80), and a '82 LS-80. None of them have a stamp. But, have seen others of similar age that do....? Often thought it was just the higher models that did, but was looking at some LS-50's on Digimart earlier today, and there was a '79 "Reborn" (like mine) that had the "50" stamp. Just curious.